Dive deep into the world of ProGuard keep rules in this 37-minute Google I/O 2018 conference talk. Explore the power of these rules in reducing Android application size through code removal and obfuscation. Understand the intricacies of how the compiler interprets and applies these rules, and learn effective strategies for specifying them correctly. Discover the impact of ProGuard on Android applications, examine common pitfalls, and gain insights into optimizing your app's size. Follow along as the speaker demonstrates practical examples, analyzes ADB logs, and discusses reflection techniques. Acquire valuable tips for both app and library developers to leverage ProGuard effectively, ultimately leading to smaller, more efficient Android applications.